Portion of a power tool



FIG. 1 is a perspective view of the top, front, and right side of a handle for a power tool showing my new design;

FIG. 2 is a perspective view of the top, rear, and right side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right side view thereof. 

The ornamental design for a portion of a power tool, as shown and described. 